本文旨在评价使用CPM模型改善日粮能氮平衡和提高奶牛生产性能的效果。
The objective of this study was to evaluate CPM model in terms of improvement in performance of lactating cows by balancing dietary energy and protein.
许多研究已证明这能改善氮平衡。
It has been shown in a number of studies to improve nitrogen balance.
许多研究已证明这能改善氮平衡。
It has been shown in a number of studies to improve nitrogen balance.
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